Saw.



No. 827,009. PATENTED JULY 24, 1906. S. J. GRAY & J. HORNING.

SAW.

APPLICATION FILED JULY 20, 1905.

IIIYEIITORS SIMON J. GRAY WITNE88 JOHN HORNING ATTORNEYS I UNITED STATESPATENT OFFICE.

SIMON J. GRAY AND JOHN HORNING, OAKLAND, CALIFORNIA.

SAW.

Specification of Letters Patent.

Patented July 24, 1906.

Original application filed April 29, 1905, Serial No. 268,102. 'Dividedand this application filed Jul 20, 1906. Serial No. 270,628.

Saws, of which the following is a specification.

Our invention is an improvement in saws; and it consists in certainnovel construc tions and combinations of parts hereinafter described andclaimed.

Referring to the drawings formin a part hereof, Figure 1 is a plan viewof t e saw. Fnilgs2 is a perspective view of two of the l' 'Fig. 3 is atop plan view of the same, and Fig. 4'-is a transverse vertical sectionthrough one of the links.

In the practicalapplication of our invention we provide an endless sawA, comprising a series of 3, connected at their ends to form an endlesschain. Each of the links B is substantially wedge shaped incross-section, as will'be see'n'by referrm to Fi 4, and the-wide ed e orbase is provi ed wit a plurality of teet bt wo in the presentinstance-the teeth on each link being symmetrically arranged withrespect to each other.

The ends of the links are provided with perforations b b at a pointnearer to the per edge of the link, and of the link are cut away over anarea correspondingto that of a circle having for a center theperforation b and a radius equal to the distance thereof from the .loweror narrow edge of the link to form a knuckle b the end of the link beingrounded,

. pose to be hereinafter described.

as at b, on-the circumference of the circle.

The upper edge of the link is cut away on a line coincidinfg with thevertical diameter of the circle to orm an abutment b for a pur- Theopposite end of the link I) has its end rounded on the circumference ofthe circle, having the perforation b as a center and a radius equal tothe distance of the erforation from the lower or narrow edge 0 the link.

A mortise b is arranged vertically in the end I) to form ears I) forreceiving the knuckle b of the succeeding link, and the u per or wideredge of the link is cut squarely away on a line coinciding with thevertical diameter of the circle to form a surface 6 for coactin with theface of the lug b on the succeeding link of the chain, and a rivet b" ispassed through the alined perforations b b to secure the links together,the outer faces.

of theears being countersunk to receive the upset ends of the of thelink. a

It will be evident from the description that the arrangement of theabove-described joint rivet flush with the surface while ermtting asuflicient degree of flexibility 1n one direction will prevent any bending of the links wi'threspect to eachother in the opposite direction.

By making the link substantially wedgeshaped in cross-section andplacing teeth on secured with a smaller amount of metal than would benecessary with a link rectangular in cross-section. The wide edge of thelink is especially ada ted to withstand compression strain and to a orda broad attachment for the teeth, while the narrow edge is sufficientlystrong to resist a tension strain. Thegra the base of the wedge a verystrong link is ual and'even reduction of thickness of the link from theen aging edgfi permits the use of a maximum 0 metal w between the sidesof the link and the material sawed. 4 v i Our improved saw is especiallyapplicable for use in .a sawing-machine of the type described in our coending application, Serial No. 258,102, file April 29, 1905, of whichthe resent application is a division.

T e outer sides of the teeth are parallel 'le preventing friction;

with each other, and a portion of the sides of the link e ual to thedepth of the abutment is of equa cross-section with'the teeth, theincline of the wedge commencing at the lower ed e of the abutment.

t will be evident from an inspection of the drawin s that the teeth ofthe saw have cutting efges higher at one end than at the other and alsoinclined across the length of the link.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-' 1. A chainsaw consisting of linkssubstantially wed e-shaped in cross-section and pro- 'vided onteirwideredge with rojectin saw teeth, the cuttin edge of t e teeth einghigher at one en than at the other and inclinedacross the length of thelinks, the sides of the teeth being parallel, each of the links beingprovided with a knuckle at one end and with a pair ofears at the otherend for receiving the knuckle of the succeeding link, a rivettraversingalined perforations in the knuckle and the ears, an abutmentabove the I knuckle, and a. surface above the earsfor co length of thelinks, the said links-being conacting with the abutment whereby thelinks nect ed at their meeting ends b a rule-joint are adapted to openoutwardly and to be adapted to open outwardl an rigid a. inst rigtidagainst inward movement when alined, inward movement when t elinks erea. ed.- 15 5 su stantielly as and for the purpose set forth. c i .2. Achainsaw consisting of links, sub i stantiell wedge-shaped incross-section and Witnesses:

provide on t eir outer edges with projectv A. S. ORMSBY, 10 mg saw-teethwhose edges are hi her at one Tnoms H. PRAY,

end then at the other and incline across the ALBERT J. F. Mum.

SIMON J. GRAY. JOHN HORNING.

